... -3RF Data rate: Max 20kbpsModulation: FSK/ASKProgram interface: SPI digital interfaceDimension: 17.6×16.1×5mm(L×W×H ) ... external antenna via IPX cable.RSSIAnalog output. CLK_OUTDigital output,clock outputVDDPower supplyGNDGNDSPISDigital input, mode selection: 0 for Fixed frequency ... 0 for reserve , 1 for 433Mhz.SPI_CLKDigital input, SPI Clock input AFSKDigital input, modulation selection: 0 for FSK; 1 ...